Re: [PATCH v5 09/12] PCI: brcmstb: Refactor for chips with many regular inbound windows

[Florian Fainelli]

On 7/31/24 15:28, Jim Quinlan wrote:
> Provide support for new chips with multiple inbound windows while
> keeping the legacy support for the older chips.
>
> In existing chips there are three inbound windows with fixed purposes: the
> first was for mapping SoC internal registers, the second was for memory,
> and the third was for memory but with the endian swapped.  Typically, only
> one window was used.
>
> Complicating the inbound window usage was the fact that the PCIe HW would
> do a baroque internal mapping of system memory, and concatenate the regions
> of multiple memory controllers.
>
> Newer chips such as the 7712 and Cable Modem SOCs take a step forward and
> drop the internal mapping while providing for multiple inbound windows.
> This works in concert with the dma-ranges property, where each provided
> range becomes an inbound window.
>
> Signed-off-by: Jim Quinlan <james.quinlan@xxxxxxxxxxxx>

Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
--
Florian